Apparatus for eye treatment



June A. A. WOELFEL 2,203,069

APPARATUS FOR EYE TREATMENT Filed Dec. 16 1935 5 Sheets-Sheet 1 June 4,1940 A. A. WOELFEL APPARATUS FOR EYE TREATMENT Filed Dec. 16, 1955 5 Sheets-Sheet 2 Fig 4.

144 602270 .z l oefe/ June 4, 1940. A. A. WOELFEL APPARATUS FOR EYE TREATMENT Filed Dec. 16, 1935 5 Sheets-Sheet 4 Fi$. IO.

June 4-, 1940. WQELFEL 2,293,069

APPARATUS FOR EYE'TREATMENT I Filed D80. 16, 1935 5 Sheets-Sheet 5 F'i .i7 Fig. (8. H819 Ema/M049 I Patented June 4, 1940 1 UNITED STATES PATENT OFFICE 2,203,069 APPARATUS FGR EYE TREATMENT Alphonso A. Woelfel, Tacoma, Wash. Application December 16, 1935, Serial No. 54,696

14 omits. (01. 128-765) This invention relates to machines adapted to A further-object is to provide a means of stim develop the muscles of the eye, and has special ulating the focusing of the eye by means of a reference to machines for use in treating various moving target which is of three dimensions.

1 abnormalities of the eyes, especially in their A further object of my invention is to provide relation to each other, and in their ability tosee a pair of targets, each of which is incomplete in t objects equally. itself but supplies the missing features or the The particular afllictions of the eye which are other, thereby stimulating their fusion by ereatto be treated with this machine are known as ing a desire to see a complete picture.

-heterophoria, strabismus, unequal ocular images, A further object is to provide means whereby 0 pseudo myopia, amblyopia, suspenopsia, colorthe two targets are rotated in unison while free 1'. blindness, and insufficient accommodation. to move laterally and longitudinally in independ- This apparatus not only acts through the optic ent degree and speed. nerve, that is to say by means of the reaction I attain these and other objects by the devices, r between the sight of the eye and the position, or mechanisms and arrangements illustrated in the motion, or color of the object seen, but it also accompa y draW1hgS,ih Which further stimulates the nervous system, first, by Fig. 1 is a perspective view of the complete the use of sound in connection with the reaction apparatus; Fig. 2 is rear view thereof; Fig. 3 of the eye; second, by the use of the sensory is a front view thereof, showing the apparatus nerves of the side of the face; and third, by the pp to correct t c l d viat o the eyes; use of the mental sense of fear caused by the Fig. 4 is a plan view of the apparatua the top an involuntary reaction of the eye and the brain to cover being removed to reveal the interior of the the motion of the approaching object seen. a n t; F 5 s a p an w f th sciss rs The objects of this inventionare to provide a mechanism whereby equal and simultaneous but mechanism which will cause an object or target, pp t al motion is given to the targets, for each eye, to move continuously with a comshowing the sc as Partially p F g- 6 pound motion, such motion comprising a rotary is a rear elevation, partly in section, of the mechmotion in a plane, a lateral motion substantially anism f r Op g the Scissors mechanism; at right-angles to the line of vision or the eye, sis a ar l vat f e ar y n f ame. and a longitudinal radial motion directly toward e targ t a r a a d t e a tp a i t a n and away from the eye, said motion being of gears; Fig. 8 is a front elevation of the means entirely independent of each other and separately whereby the two driving shafts of the two tar ,1. controlled andmay be used either alone or in mechanisms a e a a i u 9 is a combinations with each other; vertical longitudinal section of the cabinet show- Another object of my invention is t pr id ing the mechanism within the cabinet, the cover an illumination for each target which may be thereof being v Fig-1018 a d amm t c accurately controlled in intensity. view showing the mechanism for the longitudinal Another object is to provide means whereby 0f t target and e flashing f the the illumination of the target is automatically p; 11 s an enlarged View S ow n the controlled, through the longitudinal radial momeans for actuatin h con rol valve of the tion, so as to momentarily increase the illuminapn u m t for the longitudinal m i n of no tion, with the effect of a flash, when the target th ta t; F si a t n of t tar t and. is closest to the eye. I its carrier; Fig. 13 is an elevation of the target A further object is to provide a means r autok, w the target figure r v r m; matically causing a sound on that side of the Fig$- 14, 15 and 16 e Similar ews of the compatient on which the non-fixing eye is located. p e d t tin hree c nsecutive positions in its 45 A further object is to provide a mean for rotation; and Figs. 17, 18 and 19 are front elevablowing a slight pufi of air against the face, in Side elevation and P Of the r et figure, the vicinity of the eye, on that side of the patient respectively.

on which the non-fixing eye is locat d, Similar numerals of reference refer to similar so A further object is to provide a means of conparts throughout the several views. trolling the extent and the speed of the longitu- Referring to he d a s t Wil be Seen that .dinal motion of each of the targets, separately. my apparatus is mounted on a. suitable stand I A further object is to provide a means for tiltin front of the patient, and that this stand ining the apparatus in order to correct vertical cludes a table 2 from which two standards 3 exdeviations of the eyes. tend vertically upward. The front standard it no carries the optical apparatus, including the headrest 4, the apparatus 5 for holding the lenses and prisms used in connection with the treatments, and the shutters 6 whereby vision of each eye may be confined to the target on the opposite side to it, when desired. These shutters 6 are mounted on tumable pivots which are vertically mounted in the headrest 4, on the outer sides of the lenses, and may be turned out of the line of vision or each may be turned inward to block ofl or occlude the line of vision to the hereinafter described target on the same side while allowing free vision to the corresponding target on the other side of the apparatus; that is to say, the left shutter 6 may be swung in front of the left eye to prevent its seeing the left target but permitting it to freely see the right target, and vice versa. These shutters are never used alone but both are used at the same time. Both of these standards 3 carry horizontal coaxial pivots I on which the frame or cabinet 8 of the machine is mounted, whereby the said cabinet may be tilted in relation to the said headrest 4, in orderto correct vertical deviations of the eyes. The rear standard 3 carries a worm 8 meshing with theteeth of a suitable quadrant l connected to the machine frame so that by manually turning the said worm 9 the tilting of the frame 8 may be accurately controlled. A suitable indicator H is mounted on the frame to show the extent of such tilting. A suitable electric motor I2 is mounted on the floor of the cabinet 8 and operates, by means of belts and suitable transmitting mechanisms, the rotary motion of the targets l3 and the lateral motion thereof. The longitudinal motion of the two targets is operated by means of two pneumatic motors, each mounted on the laterally swinging frame and each independently controlled both as to speed and extent of motion and also, as to their relative forward and rearward motions, said pneumatic motors being operated by air pressure supplied to the machine from outside sources, not shown.

The apparatus The description of one of the targets, its operation and control, will be understood to apply to the other since they are identical.

Each target I3 is mounted at the rear end of a light-shield H which carries it and through which light, from the small electric lamp Ii,

which is carried on the upper side of the said shield l4 and shines through an opening therein illuminating the said target in all its positions. The intensity of the light from the lamp I5 is Y controlled by means of a rheostat l6 mounted on the side of the cabinet 8 and the wiring of which may be short-circuited as hereinafter described when the shield l4 reaches its extreme forward position, thus causing the lamp l5 to momen- 4 tarily increase the illumination of the target l3.

The target i3 is compound in its nature and comprises a-disk II mounted on the rear of the shield l4, said disk being provided with eccentric circles enclosing areas of different colors. For instance, I prefer to have the. central circular portion l8 white, surrounded by an area IQ of blue, outside of which is an area 28 of white, and outside of that an area 2| of red, and outside of that again an area 22 of white. These eccentric circles enclosing these areas are each eccentric from the others, though their centers lie on a single straight line, that is to say the eccentricity of the innermost circle is greater than that next enclosing it, which in turn is greater than that next enclosing it, and so forth.

. vision and near the lenses.

I mount in the center of the said innermost area I 8 a secondary target 23 in such manner that the said secondary target, while it revolves around the axis of the disk l1, does not rotate on its own axis but always maintains the same position as it revolves. I prefer to form this target 23 of a suitable carving representing some well known object, such as a bird, and, being formed in three dimensions. In certain cases and for certain purposes hereinafter described, the target 23 on one side of the cabinet may have certain features, such as a beak, eye, leg or wing, omitted, while the missing parts are supplied by the corresponding target 23 on the other side of the cabinet. I

The fixed shaft 24, which forms the bearing for the disk I1, is suitably mounted in the carrying secondary target 23 does not rotate but revolves- Thus the three gears 28, 26 and 28 form an I epicyclic train.

The carrier frame or carriage 29, which supports the disk ll, shield l4. and lamp I5, is mounted on a pair of cylindrical rods or tracks 30 and this track is mounted on the swingable frame 3|. Each said swingable frame 3| is mounted on its own particular pivot 32, said two pivots being supportedby the cabinet and being positioned on each side of the central line of The frame 3! also carries the pneumatic motor, comprising the horizontal cylinder 33, mounted parallel with the track 38, and having a piston 34 and piston rod 35 extending therefrom, said piston rod 35 being attached at its end to the carriage frame 23.

A control valve is mounted on the swingable frame 3| and comprises a valve box 38, into which the supply of air under pressure from the outside source is conducted by a suitable pipe 31. A suitable slide valve 38 is mounted within this valve box 36. The valve box 36 is provided with three ports and the said slide valve 38 is.

adapted to cover two of said ports at a time and to connectthem together but to disconnect them from the third port. The slidevalve 38 is operated by means of a swinging arm 39, suitably I connected thereto in such manner as to allow the valve 38 to move horizontally while the arm 38 is turning through a certain angle.

The central or exhaust port 40 is connected by w a flexible tube 4! to a chamber 42, past a checkvalve 43, therein, and thus to the front of the cabinet 8. An outlet pipe 44 may either be plugged by a removable plug 45 or may be provided with a removable Y-piece 46. This Y-piece 48 is provided with a whistle 47 on one branch and with a tube 48 on the other branch, said tube 48 leading to and passing through the headrest 4 in such position that it is adapted to direct the puffs of air therefrom onto the side of the face. The two chambers 42, one for each of the motors 33, are connected together freely by means of the pipe 49, in such manner that the exhaust of both of said motors 33 passes out on' the right side of the patient (as shown) or on the left side if so desired.

The two end ports 53 and 5| are connected by the tubes 52 and 53 to the control valves 54 and 55, positioned on the front of the cabinet 8 on that side of the center thereof on which the particular target is positioned, and the tubes 58 so'far as their illumination is concerned. and 51 lead from the said respective valves to It has been above stated that the carriers and the rear and front ends of the cylinder 33. The the targets, and all their operating mechanisms, piston 34 thereof is connected by the rod 35 may also be swung laterally to give an inward directly with the carriage frame 29 and moves and outward swinging motion for the purpose of the said carriage on the track 30. the correction of heterophoria or non-parallelism The carriage 29 is provided with two adjustable of the lines or vision of the two eyes. This is stops 58 and -59, each of which is adapted to accomplished by means of the following mecha- 10 contact and 'move an arm 88 on the valve box 38. nism: The pivot 8| of the outside arm 80 forms the It will be remembered that the motor i2 operpivot of the inside arm 39, which is loosely at'es the counter-shaft I0, on which the abovemounted thereon. A pin 82 extends outward described friction clutch II is mounted, and this 5- from the pivot 8| and rides loosely in the slot 83 said counter-shaft 19 is also provided with a inthe boss 84 of the inside arm 39, in such mansecond friction clutch 18 at its other end. This ner that when the carriage 29 has reached'the friction clutch 18 operates, by suitable belts, a desired end of its stroke inward or outward, the conical friction cone 'Il, and this cone 11 consaid stop 58 or 59 will first move the outside arm tacts with an adjustable friction wheel 18 mount- 88 into central position, without moving the inside arm 38 at all, but so that as the carriage 29 continues,v the pin 82 on the pivot 8| of the outside arm 88 engages the end of the slot 83 in the boss 84 of the inside arm 39 and moves Z5'--.it to shift the slide valve 38' into its opposite position, thus automatically reversing the pressure in the cylinder 33 and causing the piston 34 *therein to reverse its motion. The outside arm 88 is provided with a spring 85 connected thereto 30 and to the box 38 in such manner that as soon as it has been moved .past the central position the said spring 85 will suddenly move it into its pp extreme p sition. thus causing the motor adapted to engage in the respective slots 89 in 33 to suddenly reverse its motion. I the outer ends of a pair of scissors arms 99- and Thus it Will be n t h extent o t e 9|. These scissors arms 90 and 9| are mounted 35 forward and rearward motion of the carrier 29 on the vertical pivot 92 at a point intermediate y be accurately controlled, y adjusting the of their ends and cross each other at the said pos t ons o t e sa d stops 8 and 59 e pivot point. The forward ends of thearms so n that the Speed Of both i forward and 9| are also provided with slots93 which are 0 ward motions may be accurately controlled by in m engaged by pins one or the other of the said valves 58 or at ends of t curved Sectors g5 Each of these the front of the machine. sectors 95 is slidably mounted in a sleeve 98 suit- The carrier 29, above described, also carries a ably secured t t d of t arm 91 forming a. train o Se s 55 which connects Shaft 51 Withpart of the carrying frame 3|. As above stated, 45 thhsflid target disk and the target The each of these carrying frames 3| is mounted on 45 lowest gea 6 0f the 8 train 55, 1S slidably its own particular pivot 32, which is suitably supthey are separately controlled and operated so far as their longitudinal motion is concerned and of the screw Ill to contact different portions of the cone 11. The shaft 19 carries a worm 88 which meshes with a suitable gear 8| mounted on the vertical shaft 82. This vertical shaft 82 carpositely eccentrically mounted thereon, the one above the other, and each of, wiiich is provided with a groove adjacent-it's periphery. These grooves 85 are each engaged by suitable pins 88 mounted on and extending down from slidably 30 guided rods 81. These rods 81 also have upwardly extending pins 88 thereon; said pins being ed on a shaft 19 and adjustable thereon by means 2o ries two cam-disks 83 and 84 which are op- 5 94 mounted on the 4o by means of mounted on the shaft 81 and moves thereon with the motion of the said carriage 29. The rotary is transferred to the gear 88, and thus to the targets, by means of a I key riding in the longitudinal slot or groove in ,the said shaft, or in any other convenient manmotion of the shaft 81 ner. Since the track 38 and the frame 3| on which the carriage 29 moves, is also swingable on the pivot 32 in the cabinet, it is necessary to connect the said shaft 81 by means of a flexible shaft 89 to the driving mechanism.

This drivingmechanism comprises the abovementioned motor l2 which drives, through suitable belts, a counter-shaft 18 on which a friction clutch 1| connects, by other belting, with a central crank 12 mounted in the front wall of the cabinet 8. This central crank'12 is connected (Fig. 8) with two other cranks 14 and 18, each of which is connected and drives the flexible shaft 89 on the respective sides of the central axis of the cabinet 8. Thus it will be seen that the single clutch 1|, above described, controls the ro tion of both the disks ll of the targets. They t erefore rotate synchronously and in the same direction.

It will be seen from the above description that both of the targets rotatev in unison, but that a triangular connecting plate. 13'

ported inthe cabinet 8. Each'of the sectors 95 is concentric with its particular pivot 32 on which the whole target mechanism may be swung laterally.

The frame 3| which carries the entire target mechanism is adjustably connected to the said curved sector 95 by means of a suitable nut 98 on the arm 9'I'and a screw 99 mounted on the sector 95. The shank of the screw 99 extends out through a slot in the side of the cabinet 8 so as to be adjustable'from the outside. be seen that when the clutch "I8 is thrown into engagement the two target carriers 3| are swung laterally, simultaneously, and equally in opposite directions, and that the particular angle in relation to the headrest l andthe central axis of the cabinet maybe differently adjusted on one side than on the other.

The extent of this lateral motion may be adjusted by moving the entire scissors mechanism ed on a carrier Hill which isslidably mounted on the parallel guide tracks Hll, parallel with the central axis of the machine, and is adjustable thereon by means of the hand operated screw I82 and the fixed nut I93, in such manner that as the said carrier I0!) is thus drawn backward or 75 Thus it will ward from such position the extent of lateral motion of the target carriers 3| is increased.

In certain cases, as hereinafter set forth, the two targets are separated, so far as the visual action is concerned, by means of a septum I" which is suitably and removably mounted in the cabinet and which prevents the line of vision of either eye crossing to the target on the opposite side.

The lamp I5 is mounted in a suitable electric circuit I05, energized from a suitable source of.

electricity I 06, in which the rheostat I i is connected and by which the degree of illumination of the target is controlled. The rheostat I6 may, however, be momentarily short-circuited, to flash the lamp I5, in the following manner: A pair of spring contacts I01 and I08 are mounted on an insulated block I09 secured on the frame 3I adjacent the end of the rod which supports the adjustable stop 59, above described, in such position that when the carriage 29 reaches the adjusted forward end of its stroke, the two said contacts I01 and I09 will be pushed together by the insulated end of the said rod. The contact I0! is joined by a wire III) to one end of the rheostat I6, and the contact I09 by a wire II I to the other end thereof.

The laterally swinging and adjustable frames 3I are each provided with an indicator comprising a toothed wheel H2, secured thereto concentric with the pivot 32 thereof, and a wheel i I3 meshing therewith and suitably mounted in'the cabinet frame and suitably connected by gears to a rod H4, extending out through the cabinet wall and provided with a pointer 5 adjacent to the scale 5 and indicating the angle which the frame 3| makes with the central axis of the machine. This angle is usually measured in prism diopters.

As above stated the supply of air under pressure is delivered to each of the motors 33 by the pipes 31. It is to be understood that the air is supplied by some suitable pump, outside of the apparatus, and that each of the said pipes 97 leading to the air motors is turned on or 011 by suitable hand-operated valves, not shown.

The use of the apparatus for treatment of certain eye abnormalities When it is desired to treat heterophoria, in which the visual lines of the two eyes are not parallel the following method of operating the apparatus is used for the several types involved:

1) Erophorz'a; eyes tending to turn outward.-The patient is seated before the instrument and a septum I04 is placed in position, and if necessary, convex prism lenses are placed in the lens holder 5 in the headrest I. The targets are adjusted by means of the protruding screws 99 into corresponding or parallel positions. The motor I2 is started and the clutch I6, controlling the scissors motion, is then thrown into action to cause the frames 3| carrying the targets I3 to move outward to their extreme position and then the clutch I6 is disengaged. The switches controlling the lamps I5 are now turned on to light up both lamps to illuminate both targets and the rheostats I6 are adjusted to give 'direction to that of the deviated eye.

the desired degree of illumination. Then the clutch II, which connects the motor I2 to operate the disks I1 is closed, causing both the targets to revolve. Prisms, with the base outward, are now placed in the headrest 4 and the targets are adjusted by means of the protruding screws 99 to the position where fusion of vision takes place. The clutch I6, controlling the scissors movement, is now engaged thus causing the targets to move inward, towards each other and then outward to their former adjusted positions, and this suecessive inward and outward swinging movement of the targets causes the eyes to turn inward from the position of fusion while the rotary movement of the two targets brings all the extrensic muscles into play, as well as attracts the attention of the patient. This action is maintained until the eyes become somewhat fatigued. At each sitting of the patient the adjustment is, of course, changed so that the patient gradually builds up a sufficient muscle 'tone to effect a cure. The dials IIion each side of the cabtargets in prism diopters.

(2) Esophoria; eyes tending to turn inward.-

In this case the treatment of the patient is similar to that for exophoria, above described, except that convex lenseswith the prism base inward may be used and, also, instead bf the scissors ,movement being adjusted at its. maximum tion of fusion.

(3) Hyperphoria'; in which the line o f vision of one eye is above that of the other.-This is treated by placing the neutralizing lenses and prisms in the headrest to compensate for the position and 'distanceof the targets, and the cabinet 9 is turned on its axial pivots I by means of the worm 9 and quadrant ill in an opposite That is to say if the right eye turns upward the cabinet is tipped to bring the target which is on the right side below that which is on the left side, but not beyond the point of fusion. The targets are now rotated and the treatment continues un- The shutters 6 are now moved so that the right eye'will see only the left target and the left eye will see the right target. The targets are now adjusted laterally by means of the protruding screws 99 until fusion of vision takes place, when the scissors movement is at maximum position. If the targets do not fuse but one is above the other, then the cabinet is adjusted on its axis I to a position where both targets appear on the same plane. In this type of defect, one eye is the fixing eye while the other eye is non-fixing, or dormant. The illumination of the target which is seen by the fixing eye is reduced to a minimum by properly adjusting the rheostat It on the other side of the cabinet, while the illumination of the target seen by the non-fixing eye is increased by adjusting the other rheostat It. Inthis type of case the three-dimension target 23'is of particular value and one is mounted on the target holder of each target or revolving disk II. The target 23 before the non-fixing eye is complete in all but one or more details. The corresponding target 23, before the fixing eye, is provided with the parts omitted from the first target, and will .inet register the amount of the deviation of the r In (a f as adjusted from sitting to sitting, in the opposite not appear complete until fusion takes place. In some cases the targets 23 usedare of such design that they will attract attention by playing pn the inherent love or fear of the patient for some particular object. anism is now set in action before the non-fixing eye alone and the target before this eye is so regulated in its movement by means of the valves 54 and 55, that it will cause the patient to experience a nervous, startled, reaction akin to fear as it approaches the eye, since the motion is substantially directly along the line of vision and appears as though the target was about to strike the patient in the eye, thereby using the involuntary nerve reaction to hold and attract the fixation of this eye, and to stimulate it. As the target reaches the forward end of its movement, the illumination thereof is suddenly and momentarily increased by the carriage 29 closing the short-circuit I08 to III which cuts out the resistance of the rheostat l6, thereby producing a flash effect and further attracting the attention of and stimulating the inactive eye, This nervous involuntary reaction of fear may be increased or diminished by adjusting the valves 54 and 55 controlling the motion of the target so that the forward speed may be increased or decreased and so that the rearward speed may also be independently controlled. Also the extent of this forward-rearward motion may be adjusted to suit the conditions by shifting the position of the stops 58 and 59. The clutch H, which controls the rotary movement of the targets is now thrown into engagement to cause the targets to rotate and, thereby exercise the muscles of the eye; and, since the targets turn in unison, they assist the two eyes to fuse the images. The exhaust air from the cylindei"33, which operates the forward-rearward movement of the target, is released through a suitable whistle 41, or other sound instrument, on the side of the cabinet on which the-inactive eye is located,'thus causing the auditory nerve on that side of the head to stimulate the reaction of the defective eye. Some of this exhaust air is blown against the same side of the face of the patient thus causing the sensory nerves to similarly cooperate with the optic nerve. When the patient shows suflicient improvement in the activity of the non-fixing eye, the position of the targets are adjusted by imeans of the protruding screws 99 so that they Aare brought closer together, thereby causing the eyes to swing nearer to parallel. The scissors movement is engaged when at its maximum po- 55 'sition and the extent of the swing of the targets is adjusted to the minimum by turning the screw I02 in such manner as to carry the pivot 92 and the scissors arms 90 and 9! to their extreme forward position, substantially as shown in Fig. 4. These adjustments will naturally be done from .sitting to sitting, and when sufficient improvement is shown then treatment is completed in the same manner as above described for esophoria.

In the treatment of divergent strabismus, in which the eyes turn outward, the same procedure is followed except that a septum I is used instead of the shutters 6 and the targets are adjusted on the same side as the eyes, and the case is then finished with the same procedure as that used in treating exophoria.

In treating vertical strabismus the cabinet is tipped on its axial pivots I to make the targets appear to be in the same plane and they are then made to revolve. The tipping of the cabinet is The pneumatic motor mechdirection in which the eye turns until suflicient reserve is established. Forward-backward movement may also be used when necessary, with or without the rotary movement of the targets, taking advantage of the increased or decreased visual angle produced by the said forward-backward movement of the target. When the septum is removed and the two targets are made visible to both eyes and a compensating prism lens is placed in the headrest 4 to neutralize the working distance, three targets will be seen, if the targets are in line with the visual axisof both eyes, but if the targets are moved beyond the visual axis of either eye then four targets will appear to be seen. This phenomenon is due to the prism in front of each eye bending the light ray coming from the other target so that one target seen by each eye falls upon the fusional area of each eye and the image of the other target is focused to the periphery of the fusional area of each eye. The two central images, of the four, will fuse when the targets are properly adjusted; the remaining two images cannot fuse because they are seen outside of the fusional area of the retina.

The coloring of the eccentric rings which are painted on the disks l1 stimulate the peripheral portion of the retina, as well as tend to lead the eye to adjust itself so that the target on the disk .will be in line with the visualaxis. The red,

blue, and white rings assist in developing fusion by keeping the peripheral portion of the retina occupied while the macular area is functioning.

In the treatment of color-blindness, the two targets are rotated and instead of using the normal above-described disks .II, similar disks having suitable colors predominating are used, and the shades of these colors are changed from time to time as the patient becomes able to recognize each color thus developed; or, the colors of .the disk Il may be unchanged while the supplementary target 23 is displaced by another disk of the desired color.

Insuflicient accommodation is treated by the use of the forward-backward movement of one target at a time, while the other eye is occluded,

or with both eyes functioning, with or without the use of prismatic effect. The target disks are made to rotate and may be. adjusted to have the targets move forward and rearward in unison by suitable adjustment of the valves 54 and 55 in the front of the cabinet. I

It is, of course, to be understood that many variations of my apparatus may be made, and

that its operation may be varied to suit the par-' ticular circumstances and the judgment of the operator, the above apparatus and the above description of .itsuse being given simply as one embodiment of the invention and a few of the many methods of using it, without departing from the spirit of the invention as outlined in the appended claims. As a sample of such variation it is, of course, possible to hang the supplebest means of accomplishing the results desired.

Having, therefore, described my invention, what I claim and desire to secure by Letters Patent, is:

1. Apparatus for the treatment of the eyes, comprising a pair of targets; means for holding the patients head in fixed position; motor-driven means for moving said targets toward and away from the patients head; a whistle positioned to one side of the patients head; and means oper atively connecting said whistle to said targetmoving means and adapted to provide pfuils of air to cause said whistle to sound, thereby stimulating the optic nerve on that side sympathetically with the auditory nerve.

2. Apparatus for the treatment of the eyes. comprising a pair of targets; means for holding the patients head in fixed position; motor-driven means for moving said targets toward and away from the patients head; a tube having an outlet adjacent to one side of the patients head; and means operatively connecting said tube to said target-moving means and adapted to provide pufls of air to blow through said tube, thereby stimulating the optic nerve on that side of the head sympathetically with the sensory nerve.

3. Apparatus for the treatment of the eyes, comprising a target; means for holding the patients head in fixed position; motor-driven means for moving the target toward and away from the patient's head; means to illuminate-the target; and automatic means operated by said motor-driven means when said target is at the end of its movement nearest to the patient-"s head and adapted to cause said illumination thereof to momentarily increase.

4. Apparatus for the treatment or the eyes, comprising a target; means for holding the patients head in fixed position; motor-driven means for moving thetarget toward and away from the patients head; means to illuminate said target; means to reduce the illumination thereof; and automatic means operated by said motordrlven means, when said target is at the end of its movement nearest the patients head, to mo mentarily restore the full illumination thereof.

5. Apparatus for the treatment or the eyes. comprising a supporting frame; a pair of swing= able frames independently pivoted thereto; an actuating motor operatively connected to said swingable frames to continuously swing hath said frames simultaneously and transversely in mutually opposed directions; targets rotatably mounted on each said swinga'ole frame; and flexible actuating means omratively connecting said motor to both of said targets to rotate them on said swingableframes as said frames are being swung transversely.

6. Apparatus as set forth in claim 5, wherein the operative connection between said actuating motor and said swingahle frames includes an ad Justable friction drive, whereby the speed of said transverse swinging of said frames may no controlled without changing the speed oi rotation oi said targets.

7. Apparatus for the treatment or? the eyes, comprising a supporting frame; a pair of swing able frames independently pivoted thereto; a scissors mechanism comprising a pair of crossed levers pivoted together at their crossing point and to said supporting frame; an actuating motor operatively connected to one end of said scissors mechanism to continuously open and close said mechanism; sectors connecting the other end of seid scissors mech 4;. an the two said swingaeic dinally adjustable on said supporting frame relative to the motor connection and said sectors; together with means to so adjustably move said pivot, whereby the extent of transverse swinging I of said swingable frames is adjusted.

9. Apparatus as set forth in claim 7, together with means to adjustably move said pivot on said supporting frame, whereby the extent of trans verse swinging ofsaid swingable frames is adjusted; and together with adjustable means incorporated with said sectors, whereby the virtual lengths of said sectors may be independently adjusted and whereby the transverse position of the arc of travel of each said target may be inde--' pendently adjusted without interfering with the extent of such are of travel.

10. Apparatus for the treatment of the eyes,"

comprising a supporting frame; a track mounted thereon and extending substantially in the line of vision; a carriage mounted on said track; a reciprocating motor parallel with said track and operatively attached to said carriage to recipronote it thereon; a target rotatably mounted on v y said carriage and reciprocated therewith; and a rotating actuating motor operatively connected to said target to rotate it as said carriage is being reciprocated on said frame.

11. Apparatus as set forth in claim 10, together with reversing means for changing the direction of motion of said reciprocating motor; and adiustahle means mounted on said carriage and engaging said reversing means, whereby the extent of themotion oi the carriage on be controlled.

12. Apparatus for the treatment of the eyes, comprising a supporting frame; means, forming a part of said frame, for holding the patients the track may head in fixed position a pair of swingable frames pivoted to said supporting frame; an actuating motor operatively connected to said swingable frames to continuously swing said frames simultaneously, oppositely and transversely to the centralliue of vision; targets mounted on said swingable frames; and two independent shutters mounted in said frame adjacent the patients two eyes and each adapted to occlude only the direct vision of the adjacent eye and thereby to cause the lines of vision to cross and engagethe target adjacent the other eye.

13. .dpparatm for the treatment of the eyes,

' comprising a support a headrest mounted or. said support tor hoiding the patient's head in fixed position; a pair of coaxial horizontal pivots suitably mounted on said support and positioned substaitially in the central line of sight of the patients eyes; a cabinet mounted on said pivots and adapted to tilted thereon in respect to said headrest; a pair of independent targets mounted in said cabinet, lying in the lines of vision of the respective eyes of the patient; and means for continuously moving said targets.

14. Apparatus as set forth in claim 13, together with means for tilting said cabinet on its pi'ots and for holding'sa'id cabinet in tilted position. 

